Question

Ted can paint a room in 10 hours and Vince can paint it in 11 hours. How long will it take the two working together? Round to the nearest tenth.
Answer

10.5 hours

6 hours

5 hours

5.2 hours

Answer 1

5.2

Answer 2

u are right

Answer 3

Ted can do 1 work in 10 hours
Ted can do 1/10 work in 1 hours

Vince can do 1 work in 11 hours
Vince can do 1/11 work in 1 hours

(Ted + Vince) can do 1/10 + 1/11 work in 1 hours
(Ted + Vince) can do 21/110 work in 1 hour
(Ted + Vince) can do 1 work in 5.2 hours